Mark Hamill The Simpsons

Kim Basinger Alec Baldwin The Simpsons

Elton John The Simpsons

Dolly Parton The Simpsons

Lucy Lawless The Simpsons

[Photo Credit: FOX]

Betty White The Simpsons

[Photo Credit: FOX]

NSync The Simpsons

[Photo Credit: FOX]

Venus and Serena Williams The Simpsons

[Photo Credit: FOX]

Lebron The Simpsons

[Photo Credit: FOX]

After 25 years of The Simpsons, you’d be hard-pressed to find someone who can’t recount at least one joke from the long-running animated series. From Homer’s “Doh” to Bart’s “eat my shorts,” it’s a show stuffed with more iconic moments than anything else. Some of the best, of course, are courtesy of celebrity cameos.

Whether it’s classic stars like Leonard Nimoy or newer sensations like LeBron James, The Simpsons only invites the best talent to join its hallowed ranks. It’s seen Tom Jones performing at gun point, Luke Perry as a sideshow act, Star Wars’ own Mark Hamill being rescued by Homer himself, and Xena: Warrior Princess aka Lucy Lawless flying through the air. There’s serious actors being silly, talk show hosts like Conan O’Brien getting meta, and legendary musicians — yes, ’N Sync counts — passing through the tiny town of Springfield. In celebration of The Simpsons’ 25th anniversary, and FXX marathoning the entire series over the next 12 days, we’re taking a look at the greatest, most memorable celebrity cameos. Let us know your favorites, in the comments.